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"This copy of the Install macOS High Sierra.app application is damaged, and can‘t be used to install macOS."

Apple's October 2019 link to download 10.13 High Sierra failed:

https://itunes.apple.com/us/app/macos-high-sierra/id1246284741?ls=1&mt=12

Got this popup:

"This copy of the Install macOS High Sierra.app application is damaged, and can‘t be used to install macOS."

MacBook Air

Posted on Jan 1, 2020 5:33 AM

Reply
Question marked as Top-ranking reply

Posted on Jan 1, 2020 6:21 AM

This usually refers to a partial download of High Sierra, look in your Applications folder for Install macOS High Sierra.app

move it to the Trash, empty the Trash.

If you can, connect your mac to your router using a cabled connection. USB to ethernet cable or Thunderbolt to Ethernet cable.

Restart your mac, click on this link, How to upgrade to macOS High Sierra - Apple Support

Go to Section 4 and click on Get macOS High Sierra.

Do not use your mac while it is downloading. If any other devices share your internet connection, don't use them either.

2 replies
Question marked as Top-ranking reply

Jan 1, 2020 6:21 AM in response to harryfromemporia

This usually refers to a partial download of High Sierra, look in your Applications folder for Install macOS High Sierra.app

move it to the Trash, empty the Trash.

If you can, connect your mac to your router using a cabled connection. USB to ethernet cable or Thunderbolt to Ethernet cable.

Restart your mac, click on this link, How to upgrade to macOS High Sierra - Apple Support

Go to Section 4 and click on Get macOS High Sierra.

Do not use your mac while it is downloading. If any other devices share your internet connection, don't use them either.

"This copy of the Install macOS High Sierra.app application is damaged, and can‘t be used to install macOS."

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